Stephens beats Keys for US Open women's title

The elder Murray won his fifth Grand Slam title (two more than Sir Andy) after beating Michael Venus and Hao-Ching Chan 6-1, 4-6, 10-8 at Flushing Meadows, maintaining an unbeaten run that also saw them win Wimbledon.

Murray and Hingis won the Wimbledon crown together earlier this summer.

Martina Hingis, of Switzerland, left, returns a shot as doubles partner Chan Yung-Jan, of Taiwan, looks on during the doubles semifinals of the U.S. Open tennis tournament against Sania Mirza, of India, and Peng Shuai, of China, Friday, Sept. 8, 2017, in NY.

Hingis, who shared the mixed doubles title Saturday with Britain's Jamie Murray, won her 13th Grand Slam women's doubles title and Chan took her first as they defeated Czechs Lucie Hradecka and Katerina Siniakova 6-3, 6-2.

Hingis, who reached No. 1 in the rankings and won five Grand Slam singles titles in the 1990s, initially quit tennis in 2002 because of foot and leg injuries, then rejoined the circuit full-time in 2006.

Murray said he had enjoyed every minute of his time on court with Hingis. "So that's not an issue this time, I believe", she said.

And the 36-year-old - she turns 37 later this month - appeared to hint during the press conference that she is thinking about retiring for a third time.

The Kiwi bounced back by unleashing four straight wins with Chan, the world's 12th-ranked women's doubles player.

The Scot said: "This scoring format is a lot more random than at Wimbledon".

Both are playing the best tennis of their careers after having surgery. She had surgery in January and returned to the tour in July. "It's been a lot of fun for me and a great opportunity for me to compete with Martina", he said.